Because of her ingrained belief system, brainwashed into her mind since childhood, she absolutely cannot face the fact/admit to herself that she actually had an abortion. Yes, it was objectively and truly an actual abortion.
Assuming that like most evangelicals her belief is that life begins at conception, to admit that she had an abortion would be to admit that she herself is what she accuses other women who have abortions to be: immoral sluts who murder children as their birth control method of choice. She would also have to acknowledge that by her actions she has caused immense pain and suffering, even death in some cases, to other women.